Textile Science and Engineering (한국섬유공학회지)

The Korean Fiber Society (한국섬유공학회)
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Effect of Caron Nanofiber on Melt-crystallization Behavior of Polyketone

탄소나노섬유가 폴리케톤의 용융결정화거동에 미치는 영향

  • Kim, Sung Hae (Department of Polymer Science and Engineering, Kumoh National Institute of Technology) ;
  • Park, Jinho (Department of Advanced Organic Materials and Textile System Engineering, Chungnam National University) ;
  • Lee, Sang Cheol (Department of Polymer Science and Engineering, Kumoh National Institute of Technology) ;
  • Jeong, Young Gyu (Department of Advanced Organic Materials and Textile System Engineering, Chungnam National University)
  • 김성혜 (금오공과대학교 화학소재융합학부 고분자공학전공) ;
  • 박진호 (충남대학교 유기소재.섬유시스템공학과) ;
  • 이상철 (금오공과대학교 화학소재융합학부 고분자공학전공) ;
  • 정영규 (충남대학교 유기소재.섬유시스템공학과)
  • Received : 2016.06.30
  • Accepted : 2016.08.14
  • Published : 2016.08.31
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Abstract

We report the influences of carbon nanofiber (CNF) on the melt-crystallization behavior and structures of polyketone (PK) composites, which were manufactured by a solution blending process. For this purpose, melt-crystallization experiments of neat PK and its composites, including 0.5 and 1.0 wt% CNFs, were carried out at different isothermal temperatures by using a differential scanning calorimeter and the results were analyzed using the Avrami equation. For all neat PK and PK/CNF composites, the Avrami index n remained unchanged, regardless of the isothermal crystallization temperatures ($T_c$), whereas the rate constant K and the inverse of crystallization half-time (${t_{1/2}}^{-1}$) increased noticeably with decreasing ${T_c}^{\prime}s$, indicating faster melt-crystallization rates at lower ${T_c}^{\prime}s$. It was further revealed that the melt-crystallization rates of PK/CNF composites were far greater than those of neat PK owing to the nucleating effect of CNF to the melt-crystallization of PK and that the composite with 1.0 wt% CNF exhibited slightly better crystallization rates, compared to the composite with 0.5 wt% CNF. Polarized optical microscopic images and X-ray diffraction patterns also support that CNF contributes to accelerate the melt-crystallization rates of PK without influencing the crystal structure of PK ${\beta}$-form.

Keywords

References

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